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Rapid Fabrication of ZnO Tetrapod Based Photoconductive Cell by Microwave Synthesis Technology

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ZnO tetrapods were synthesized in a few seconds by "environmentally green" microwave evaporation of Zn powder in air atmosphere. No any kind of organic solvents or precursors were used. X-ray diffractometry (XRD) indicated that synthesized tetrapods have well developed hexagonal wurtzite structure. Photoconductive cell performed high sensitivity to ultraviolet light (UV) in the range of 300 to 400 nm wavelength. Notably device is totally blind to visible light. Maximum spectral response was observed at 370 nm wavelength. UV-visible spectrophotometer revealed absorbance at UV region with cut-off wavelength at 370 nm which corresponds to 3.4 eV energy bandgap. Response–recovery time of photoconductive cell was 50 seconds at room temperature. Resistivity changed from 70 MΩ in dark to less than 1.4 MΩ at 18 mW/cm2 370 nm wavelength light irradiation. Results were discussed.
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Keywords: MICROWAVE SYNTHESIS; PHOTOCONDUCTIVE CELL; ZN POWDER; ZNO TETRAPODS

Document Type: Research Article

Publication date: March 1, 2016

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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